The document discusses various types of clasps used in orthodontic removable appliances for retention, including advantages and disadvantages for each type. It details the construction, applications, and limitations of clasps such as the 'C' clasp, adam's clasp, jackson's clasp, and others. Additionally, it addresses the specific uses and considerations for each clasp type in relation to tooth eruption and patient comfort.

1. IN THENAME
OF
GOD
EhsanMotamedi
Department of orthodontic
Shahid Beheshti medical sciences university
Tehran, Iran
Retentioncomponentsin
orthodontic removableappliance

2. DEFINITION
&
TYPES
• Clasps are wire components that aid in retention of a
removable appliance. These are the retentive
components that aid in keeping the appliance in place
and resist displacement of the appliance
• Type of clasps in orthodontic :
1. 'C' clasp or ¾ 'C' clasp
2. Adam’s clasp and it’s modifications
3. Jackson’s clasp
4. Triangular clasp
5. Eylet clasp
6. South end clasp
7. Schwartz clasp
8. Duyzing clasp
9. prefabricated clasp

3. 'C' CLASP
Advantages :
Disadvantage :
Simple to construct
Prevent mesial migration of tooth
It can’t be used in partially erupted teeth.
Inadequate retention in primary teeth.
Just for molar and premolar
Hard to adjust and Easily set out
Easy to fabricate
Throw Distance between teeth

4. ADAM'S CLASP Parts of Adam’s clasp
• Two arrowheads
• Bridge
• Two retentive arms
Advantages:
• This clasp is strong, simple and easily
constructed.
• It can be used on any tooth (deciduous
or permanent, partially or fully erupted,
incisors or premolars or molars).
• It is comfortable to wear and resistant to
breakage.
• It is small and occupies minimum space.
• It can be modified in a number of ways.
• Nospecialized instrument is needed for
construction of clasp. Routinely used
Young’s Universal plier or Adam’s plier
can be used.

5. MODIFICATION
S OF ADAM’S
CLASP
SOLDEREDHOOK
DISTALTRACTION
HELIX
ADDITIONALARROWHEAD
BUCCALTUBE
ONINCISORS

6. JACKSON’S
CLASP
Advantages:
Disadvantage:
Simple to construct
Offers adequate retention
Inadequate retention in partially erupted teeth.
Just for molar and premolar
Hard to adjust and Easily set out
Throw Distance between teeth

7. TRIANGULAR
CLASP
• engages the proximal undercut of two
adjacent teeth
• It provides excellent retention.
• It doesn’t cause irritation of gingiva.
• It is used when additional retention is
required.

8. EYLET CLASP
Advantages:
Disadvantage:
Probability of breaking is very low
Not interrupt The tooth eruption.
Requires special pliers
Occupies more space
Hard to adjust and Easily set out
Throw Distance between teeth

9. SOUTH END
CLASP
• It provides retention in the anterior region.
• The wire is adapted along the cervical margin
of both the central incisors.
• The distal end of the wire crosses over the
Occlusal embrasures and end as retentive
arms on the palatal side.

10. SCHWARTZ
CLASP
Advantage :
• This clasp has a number of arrowheads that
engage the inter-proximal undercuts of posterior
teeth.
• Not interrupt The unerupted tooth or primary teeth.
• Can set it up for mesial or distal easily
Disadvantage :
• It needs special arrowhead forming pliers.
• It occupies a large amount of space in the buccal
vestibule.
• The arrowheads can injure the interdental soft
tissues.
• It is difficult and time consuming to fabricate.

11. DUYZING
CLASP
Advantages:
Disadvantage:
Possible to use only one-half of the clasp
One-half may be made to extend fully to the anterior or posterior part of the tooth
Provides limited retention
Accumulation of food debris is more in this type of clasp
Does not irritate of the gingiva

12. PREFABRICATED
CLASP
ARROWHEADCLASP
INTERDENTALCLASP
ARROWHEADANCHORCLASP
TRIANGULARCLASP
BALLENDCLASP

13. THANK YOU FOR
YOUR
ATTENTION